CN202133597U - A device for measuring the relationship between plant transpiration and leaf area - Google Patents

Abstract

The utility model relates to a device for measuring relationship between plant transpiration and leaf area. The device comprises an inner cylinder, an outer cylinder and a water supply pipe, wherein, the inner cylinder adopts a cylinder body with a sealed bottom and a cover; a seedling-out hole is formed on the cover; the outer cylinder comprises an inner space, an outer space and a seedling-out slot; the inner cylinder is arranged in the inner space in a matched manner; the seedling-out slot corresponds to the seedling-out hole of the inner cylinder; and the water supply pipe is connected with the outer space of the outer cylinder. The device provided by the utility model has a reasonable structure, can effectively reduce or eliminate the disturbance of the environmental condition influencing the measuring result, is convenient to use and has accurate measuring result.

Description

A device for measuring the relationship between plant transpiration and leaf area

technical field

The utility model belongs to the technical field of farmland water balance observation, in particular to a device for measuring the relationship between plant transpiration and leaf area.

Background technique

Plant transpiration refers to the process of water loss from the surface of living plants, mainly leaves, into the atmosphere in the form of water vapor. In farmland, plant transpiration and soil evaporation together constitute farmland evapotranspiration.

It is generally believed that soil evaporation belongs to ineffective evaporation, while plant transpiration is closely related to plant leaf area and affects plant biomass. Farmland evapotranspiration can be measured by lysimeter and other equipment, but it is a technical problem to distinguish soil evaporation from plant transpiration.

Some scholars use potted plants or incubators to cover the soil surface with films, covers, straw or sand to inhibit soil evaporation. Since the growth quality of plants is less than five thousandths of plant transpiration, people usually use the water balance method to measure Plant transpiration, but potting and covering will cause the plant evaporation environment to be inconsistent with the actual situation in the field, especially the heating effect of direct solar radiation on the pot, or the reflection effect on the covering, and the temperature rise caused by the suppression of soil evaporation Higher factors will inevitably affect the measurement accuracy more or less.

Utility model content

The technical problem to be solved by the utility model is to provide a device for measuring the relationship between plant transpiration and leaf area. The device has a reasonable structure and can effectively reduce or eliminate environmental condition changes that affect the measurement results.

For achieving said purpose, the technical scheme that the utility model takes:

A device for measuring the relationship between plant transpiration and leaf area, including an inner cylinder, an outer cylinder and a water supply pipe,

The inner cylinder is a cylinder with a bottom and a cover, and the cover is provided with a seedling hole;

The outer cylinder includes an inner and outer two-layer space and a seedling emergence slit, and the inner cylinder is matched and arranged in the inner space; the seedling emergence slit corresponds to the emergence hole of the inner cylinder;

The water supply pipe is connected with the outer space of the outer cylinder.

The outer cylinder is filled with soil, and the water content of the soil is maintained through the water supply pipe to maintain the evaporation environment; the upper part has a slit for emergence, so that the plants in the inner cylinder can grow through the slit. The inner cylinder is used for plant transpiration measurement. The inner cylinder is a cylinder with a bottom cover and a cover, and the top cover on the upper part of the cylinder can be removed, and there are slits on the cover for plant growth.

Preferably, the outer cylinder is formed by connecting two semi-annular cylinders symmetrical to the center, the inner wall of the semi-annular cylinders is provided with an upper groove and a lower groove connected to each other, and the two lower grooves of the two semi-annular cylinders The grooves cooperate to form an inner layer space, and the two upper grooves cooperate to form a seedling emergence slit.

Further, the two halves of the circular cylinders are plugged and fitted with each other.

The utility model has the following advantages:

本实用新型通过设置与植物生长环境相同的外筒来测定植物蒸腾量，尽量保证测量环境条件与实际情况一致，外筒通过设置供水管为外筒供水，保持跟内筒的水分含量一致，以此来抑制内筒土面蒸发，使之接近“零”，如此建立植物蒸腾量与其叶面积的关系。

The utility model measures the plant transpiration by setting the same outer cylinder as the plant growth environment, so as to ensure that the measurement environment conditions are consistent with the actual situation. The outer cylinder is provided with a water supply pipe to supply water to the outer cylinder to keep the moisture content consistent with the inner cylinder. This is to suppress the evaporation of the soil surface in the inner tube, making it close to "zero", so as to establish the relationship between plant transpiration and its leaf area.

 本实用新型结构设计合理，内筒和外筒均设置用于植物生长的缝隙，结构简单，使用方便。

The utility model has reasonable structural design, and the inner cylinder and the outer cylinder are provided with gaps for plant growth, the structure is simple, and the use is convenient.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of outer cylinder;

Fig. 3 is a half-side structural schematic diagram of Fig. 2;

Fig. 4 is a schematic structural view of the inner cylinder. the

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing.

Example

As shown in Figures 1, 2, 3, and 4, this embodiment includes an inner cylinder 1, an outer cylinder 2 and a water supply pipe 3. The inner cylinder 1 is a cylinder with a bottom cover and a cover 4, and the cover 4 is provided with There is a seedling hole 5; the outer cylinder 2 is formed by inserting and cooperating two semi-annular cylinders which are centrally symmetrical, and the inner wall of the semi-annular cylinder is provided with an upper groove 21 and a lower groove 22 which communicate with each other. The two lower grooves 22 of the two halves of the circular cylinder cooperate to form an inner layer space, and the inner layer space is placed with the inner cylinder 1; the two upper grooves cooperate to form a seedling emergence slit 6, and the seedling emergence hole 5 of the inner same 1 corresponds to the emergence slit 6. The emergence hole 5 and the emergence slit 6 allow the plants in the inner tube 1 to grow through. The outer cylinder 1 is filled with soil, the water supply pipe 3 is connected to the outer space of the outer cylinder 1, and the water content of the soil in the outer cylinder 2 is maintained through the water supply pipe 3 to maintain the evaporation environment.

When measuring,

将内筒1装满土壤，调节水分到植物生长不产生胁迫时的下限土壤含水量，播种植物，使植物出苗位置对应上盖的出苗孔5，使用泡沫细颗粒遮挡出苗孔非植物生长的表面，尽量抑制土面蒸发，使之接近“零”；盖上盖4，称量其质量；

Fill the inner cylinder 1 with soil, adjust the water to the lower limit soil water content when plant growth does not produce stress, sow plants so that the position of plant emergence corresponds to the emergence hole 5 of the upper cover, and use fine foam particles to cover the surface of the emergence hole that is not a plant growth , suppress the evaporation of the soil surface as far as possible, make it close to "zero"; cover the lid 4, weigh its quality;

Fill the outer cylinder 2 with soil, and adjust the water content to be consistent with that of the inner cylinder 1;

将内筒1嵌入外筒2，使出苗孔5对应出苗狭缝6；

Insert the inner cylinder 1 into the outer cylinder 2, so that the emergence hole 5 corresponds to the emergence slit 6;

使用供水管3给外筒2供水，使其在蒸发过程中含水量与内筒1土壤保持一致，用于保持蒸发环境；

Use the water supply pipe 3 to supply water to the outer cylinder 2, so that the water content in the evaporation process is consistent with that of the soil in the inner cylinder 1, and is used to maintain the evaporation environment;

After every 24 hours, the quality of the inner cylinder 1 is weighed. Since the soil evaporation is basically suppressed, the difference in quality can basically be considered as the plant transpiration value;

量取植物叶面积的变化，并根据步骤

测得的蒸腾量值，可以求得植物蒸腾量与植物叶面积的关系。

Measure the change of plant leaf area, and according to the steps

The measured transpiration value can be used to obtain the relationship between plant transpiration and plant leaf area.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.

Claims (3)

1. a device of measuring plant transpiration and leaf area relation is characterized in that, comprises inner core, urceolus and feed pipe,

Said inner core is back cover, the cylindrical shell of lid is arranged that said covering is provided with the hole of emerging;

Said urceolus comprises inside and outside two sheaf spaces and emerges slit that what said inner core mated is arranged in the inner space; The hole of emerging of the said corresponding inner core of slit of emerging;

Said feed pipe is connected with outer space at urceolus.

2. the device of mensuration plant transpiration according to claim 1 and leaf area relation; It is characterized in that; Said urceolus is formed by connecting in centrosymmetric two semicircular ring tubes; The inwall of said semicircular ring tube is provided with upper groove and the low groove that communicates, and two low grooves of said two semicircular ring tubes cooperate and are inner space, and two upper grooves fit in the slit of emerging.

3. the device of mensuration plant transpiration according to claim 2 and leaf area relation is characterized in that, the cooperation of pegging graft each other of said two semicircular ring tubes.

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